Method and apparatus for manufacturing bottle caps



Dec. 15, 1936. I w. M. YVOGEL METHOD AND APPARATUS FOR MANUFACTURINGBOTTLE CAPS Filed May 24, 1933 INVENTOR IVZZZzarrz/Zadz'rz l l IL vPatented Dec. 15, 1936 UNITED STATES PATENT OFFICE METHOD AND APPARATUSFOR MANUFAC- TUBING BOTTLE CAPS 31 Claims.

My invention relates to closure caps for jars, bottles, and the like,the invention being more particularly related to a method and apparatusfor manufacturing such caps.

One of the objects and purposes of my present invention is to provide amethod and apparatus for the production of closure caps produced withintegral inturned beads and lugs having resilient characteristics andwhich are so formed that an easy, smooth, and resilient turning actionwill be had both on the application of the caps to, and on their removalfrom, the spirally-disposed threads of the bottles; and further thatwhen the caps are tightened upon the bottles, an efficient locking,sealing, and binding action will be had, which action, althoughsufficiently resilient to enable easy removal of the caps by thefingers, will nevertheless be sufficiently firm to prevent accidentalremoval or any rocking or wabbling of the caps.

I have found that the desired results may be accomplished in a highlyadvantageous manner by inbending the entire circumferential rim portionof the annular flange or skirt of the cap into a resilient bead, andalso bending or pressing from the bead as it is being formed, one ormore resilient, inwardly directed, free-edged thread-engaging lugs.

The bead and the lugs are produced at the same time and thereforepossess an inherent inter-communicating resiliency which makes itselffelt in the smooth yet positive binding and sealing action effected withthe threads of the, bottle. The base portion of each lug is symmetricalwith the bead, having-therewith the same curved form. From its baseportion, each lug is pressed radially inwardly of the bead and slopedtoward the crown of the cap so that upon the application of the cap, thefree edge of the lug will engage and contact the underside of thescrew-thread at an angle. The base portion of the lug being symmetricalwith the bead and the opposite end portions of the lug merging on acurve into the bead, the thin lug is strengthened, a too great yieldingthereof is avoided and a smooth application and tightening of the capare obtained even under a strong and sudden application of pressure,inasmuch as the bead is to an appreciable extent responsive to theyielding of the lug while preventing any undesirable yielding of thelatter.

For the purpose of carrying out my present invention, I have devised avery simple apparatus for automatically forming the bead and lugs at asingle operation. This apparatus may be operated with great rapidity,providing thereby for the production of the caps in very largequantities and at low cost.

With the above and other objects in view, my invention consists in theimproved method and apparatus and in the combination and relativearrangement of the component elements, as will be hereinafter more fullydescribed, illustrated in the accompanying drawing, and finally claimed.

In the drawing, wherein I have illustrated one simple and satisfactoryexample of my apparatus for carrying out my new method and in whichsimilar reference characters designate corresponding parts throughoutthe several views:-

Figure 1 represents a. front elevation of my improved apparatus; i

Fig. 2 is a longitudinal sectional view through the forming tool;

Fig. 3 is a fragmentary detail section showing the parts of the tool inthe relative positions they occupy while in the act of producing thebead and lugs;

Fig. 4 is a transverse section taken on the line 4-4 of Fig. 2, but withthe anvils omitted;

Fig. 5 is an underneath plan view of the tool;

Fig. 6 is an underneath plan view of the cap produced by the apparatus;

Fig. 7 is a fragmentary detail view, more or less diagrammatical incharacter, showing a pressed lug together with the anvil and former forproducing the same, these parts being illustrated in proper thoughseparated relation;

Figs. 8 and 9 are sectional views taken respectively on the lines 8-8and 9-9. of Fig. 6; and

Fig. 10 is a detail elevation taken on the line ill-iii of Fig- 6.

For purposes of illustration, my invention is shown in connection with apress including an upright frame in the top of which in bearings I 5 ismounted a rotary shaft it carrying a drive wheel it which may beoperated from any suitable source of power. By suitable transmissionmechanism, power is taken from the rotary shaft for reciprocating thesliding element it in the cross head it which is mounted forreciprocation in the guides it on the standards 2 i, this arrangementbeing such that the sliding element is on each of its down strokes willgive the cross head a positive down stroke or impulse. In the table 22,from which the standards rise, there is provided. a cup shaped die forreceiving and retaining 1 plunger in the form of a cylindrical head 25having a relatively long stem 26, that end of the stem opposite the headbeing provided with screw threads 21 whereby to secure the plunger inthe sliding element I8. A hollow cylindrical die element 28, whichsurrounds the plunger for relative longitudinal sliding movement,slidably fits the circumference of the cylindrical head 25, and the end28 of this element is provided in juxtaposition to the surface of thecylindrical head with an annular groove or recess 29. As illustrated inFigs. 2 and 3, the groove or recess 29 is open both at the end 28 and atthe inner side thereof adjacent the periphery of the plunger. Withrespect to the plunger, the die element is normally maintained in anelevated position against a nut 30 on the screw-threaded region 21, bymeans of a spring 31 coiled around the plunger stem within the chamber32. The upper end of this spring abuts a shoulder 33 while the lower endthereof abuts a washer 34 disposed on spacing pins 35 projectingupwardly from the plunger head 25. The die element 28 is connected withthe cross head H! by means of a screw 36 or equivalent means so that thecross head and die element will reciprocate together; and as shown inFig. 1, 'these parts are so arranged that the cross head will normallyassume a position spaced a distance below the sliding element I8,thereby permittingv the latter to move the plunger downwardly a shortdistance before the die element is moved downwardly by reason of theengagement of the lower end of the sliding element with the upper end ofthe cross head.

The cylindrical head 25 of the plunger carries adjacent its lower end 31a strike plate 38 of circular form, both the cylindrical head and thestrike plate being of a diameter considerably less than the internaldiameter of the cap closure blank 39, as shown in Fig. 2. The strikeplate 38 is connected with the cylindrical head for relative movementwith respect thereto, the mode of connecting these parts as illustratedin the drawing, consisting in providing the strike plate with rigidlyengaged pins 40 which have sliding movement in bores 4| provided in thehead in parallel relation to the axis thereof. The underneath face ofthe strike plate is shaped in conformity with the curvature of the crown42 of the cap closure blank.

The cylindrical head of the plunger is provided with a diametrical slot43 which is open at the opposite sides of the plunger head and as wellat the free end 31 thereof. Mounted on a pivot pin 44 for up and downpivoting or swinging movement in the slot 43 are anvil members 45, thesaid pin 44 being secured in the cylindrical head at right angles to theaxis thereof and extending across the slot 43. The anvils 45 engage andcontact with the top surface of the strike plate 33 and the anvils aremade with integral bills or projections 49, adjacent to which arestraight edge portions 50 adapted to rest flat upon the top surface ofthe strike plate when the anvils and strike plate are in elevatedposition with the strike plate engaging the end 31 of the cylindricalhead, as shown in Fig. 3. The anvils are so formed and arranged thatwhen they are in elevated position as shown in Fig. 3 the bills willproject radially from the opposite ends of the open slot 43 and with thepoints of the bills terminating in proximity to the inner face of theannular flange 39 of the cap closure blank and also at a point a shortdistance below the rim edge 39" of said flange; and further that whenthe anvils are in their lowered position, as shown in Fig. 2, the billswill be substantially within the outline of the aligned cylindricalsurfaces of the plunger head and strike plate.

The anvils are normally urged by the springs 46 into that position inwhich the strike plate is extended below or in front of the end 31 ofthe plunger head. The plunger descends with the parts in thisrelationship and so enters the open end of the inverted cap closureblank. When the strike plate engages and contacts with the inner face ofthe crown 42 of the closure cap, the anvils are forced to move upwardlyand they assume their determinate elevated position when the lower endof the cylindrical head impinges upon the strike plate. Substantiallywith the elevation of the anvils to their elevated position, the dieelement engages the free lower bottom or rim edge of the flange,inwardly upsetting the entire annular rim edge portion 39" thereof,which inwardly upset portion following the curved form 5| of the dieassumes at the lower free rim edge or bottom of the flange, the form ofan inwardly rounded rim edge 52 with its terminal or marginal interiorrim edge portion rounded away inwardly from the surface plane ofoutstanding rim rotundity and then finally curved upon itself tocomplete or produce a curled head 53 adjacent the inner face of theflange 39. At the places where the bills 49 are located, instead of.producing the curled head 53 following the rounded rim 52, segments ofthe upset terminal portion are pressed into projecting lugs 54. When thebills' are in elevated position, top portions 55 thereof adjacent thepoints of the bills are inclined downwardly and inwardly toward the axisof the closure cap, so that the pressed lugs 54 are also given adownward inclination in conformity with the top portions 55. Owing tothe points on the bills and to their location with respect to theinwardly upset terminal portion, the outermost rotundity of thetransversely rounded rim 52 is followed by slight valleys 55 and then bysecondary transverse curves 51 produced by pressing the material aroundthe points of the bills and between the curved form 5| and thedownwardly inclined top portions 55 of the bills. By this arrangementthe lugs 54 merge at their bases with the inwardly rounded rim edge 52and inwardly of the slight valleys 5.6, are in the form ofv secondarytransverse curves, while their opposite proximate ends merge throughcurves 58 with the curled head 53.

As will be noted in Fig. 9, the end of the curled bead 53 does notengage and contact with the employed to produce additional lugs.

spersed or incorporated in the bead, provision is made for aninter-communication of resiliency between the projecting lugs and thebead. One advantage of this is that in applying a closure cap made inaccordance with my invention to the spirally inclined threads of a jaror bottle, the projecting lugs which engage angularly against theunderside of the bottle threads and the resilient bead which engagescircumferentially with the bottle threads; afford an intercommunicatingresiliency which permits an easy, smooth and progressive tightening ofthe cap as it is applied to the bottle. Another advantage is that whenthe cap is tightened upon the bottle, a firm binding and sealing-effectis obtained. It will also be recognized by the same tokens that inreversely turning the cap for removing it from the bottle, there will bea similar easy and smooth releasing engagement. A further advantage ofmy invention is to be found in the fact that the inside bead with itsinterspersed lugs is produced without marring or deforming the outerface of the flange in any way. The plain, unobstructed, outer face ofthe fiangemay be used to display printed instructions, legends,advertisements, and the like.

From the foregoing description, it will be recognized that with eachdown movement of the plunger and die member, a cap closure blank will beoperated upon to form on the annular flange thereof. an inside bead andlugs for resiliently engaging the spirally disposed threads of a jar orbottle. It will be realized that the inwardly rounded rim edge affordsthe base both for the bead and the interspersed projecting lugs, andthat the thin pressed resilient lugs will not yield too readily orgreatly, since the less resilient bead acts as a restraining force,progressively limiting the yielding of the lugs.

' The number of lugs produced on the bead depends upon the number ofanvils employed. In the present embodiment I have shown two anvils tomake two lugs, but additional anvils may be In some instances, only onelug is required on the cap, in which event only one anvil will beemployed.

The apparatus of my invention is capable of rapid operation, in fact itwill accurately produce the beads and lugs just as rapidly as the blankscan be fed to the retaining die for the operation and then expelledafter the operation. The caps may be fed one after another to theretaining die by means of a chute or a conveyor. Whereas, in the presentembodiment, I have illustrated the plunger and die element mounted forreciprocation in a vertical direction, such position is not necessary,as these parts will function in the same manner to produce. the sameresults when inclined in any direction or even when inverted. Theparticular manner in which these parts are mounted for operation maydepend upon the nature and character of the automatic devices forfeeding the blanks, for retaining them while being operated upon, andfinally for ejecting them after the beads and lugs have been produced.

As many changes could be made in the above described construction, andmany apparently widely different embodiments of this invention could bemade without departing from the scope thereof; it is intended thatallmatter contained in the above description or shown in the accompanyingdrawing should be interpreted as illustrative and not in a limitingsense.

and not of limitation, and I have no intention, in the use of such termsand'expressions, of excluding any equivalents of the features shown anddescribed or portions thereof, but recognize that various modificationsare possible within the scope of the invention claimed.

I claim:-

1. The method of forming an interior bead and a projectingthread-engaging lug on a cap closure flange, which consists in bendingthe rim portion of the flange inwardly into the interior of the closurein proximity to the inner face of the flange, continuing the bending ofthe inbent portion until it assumes the form of a curled bead, and whilecontinuing the bending applying a retarding force to a segment of theinbent portion by means at the underside thereof to give the retardedsegment the form of a resilient threadengaging lug incorporated in thebead.

2. In the art of bottle cap manufacture, means for inbending thecircumferential rim portion of the cap flange into an inner projectingportion surrounded by the flange, and means comprising differentlyshaped and simultaneously effective parts for pressing and shaping theinner projecting portion into a rolled bead lying adjacent the flangeand a thin inwardly projecting segment merging with said bead and whichpresents a thread engaging surface.

3. The method of fabricating a screw type cap closure having an annularflange projecting from its crown and an interior bead embodying thinfree-edged lugs inclined toward the crown, which consists in uniformlybending an annular portion of the flange bodily inwardly whilemaintaining a pressure for shaping such portion into a bead curled uponitself at the inner face of the flange, concurrently interrupting theshaping int-o curled bead form, of relatively small segments and inpressing the segments into relatively thin resilient projecting lugshaving free edges.

4. The method of producing a thread-engaging lug on the metallic annularflange of a cap closure, which consists in inwardly inbending, withoutdeforming the outer face of the flange, the rim portion of the flange,maintaining a pressure for curling the rim portion upon itself toproduce a-resilient open bead at the inside face of the flange, andconcurrently pressing a segment of the inwardly bent rim portion toproduce a resilient projecting lug having communicating resiliency withthe curled bead at either side thereof.

5. In apparatus of the character described, means for retaining a capclosure having an annular flange, a movable die member for inwardlybending the rim portion of the annular flange and shaped to form theinbent portion into a bead lying adjacent the inner face of the flange,an anvil movable within the outline of the flange into a position to beengaged by a segment of the rim portion, said die member havingcooperation with the anvil concurrently with the shaping of the bead topress the segment into a projecting lug the proximate ends of which areintegrally connected with the bead.

6. In an apparatus of the character described, means for retaining acapclosure having an annular flange, a movable die member having agroove for inwardly bending the rim portion of the annular flange toproduce on the flange an inwardly rounded rim edge, said groove beingshaped to press the inwardly bent material following the rounded rimedge into a bead of the desired configuration, an anvil within theoutline of the flange for engaging a segment of the inwardly bentmaterial at a point beyond the rounded rim edge, said groove cooperatingwith the anvil to press the engaged segment into a projecting lugbeginning at the proximate termination of the rounded rim edge andending in a free edge.

'7. Apparatus of the character described comprising a movable die memberfor inwardly upsetting the rim portion'of an annular flange to form acurled interior bead, a plunger movable in the die member and carryingin advance thereof a relatively movable strike plate adapted to enterthe space defined by the flange, anvil members movable to effectiveposition by the strike plate and adapted, in their effective position,to be engaged by the rim portion being upset for pressing outconcurrently with the formation of the interior bead thread engaginglugs which merge with said bead, said anvils cooperating with said die,and the last-mentioned being effective to press the lugs into convexlyrounded shape upon the anvils.

8. Apparatus of the character described comprising means for retaining acap closure at a fixed location, a reciprocating die member adapted, onits advancing stroke, to bend the rim portion of the closure inwardlyand form an interior head, a reciprocating plunger in the die memberadapted to enter the open end of the closure so as to be surrounded bythe flange thereof, a relatively movable strike plate carried by theplunger to enter the closure in advance of the plunger and strike thecrown of the closure, and movable anvil members operated by the strikeplate and adapted, in their operative position, to be engaged by the rimportion which is being bent into a bead, said anvils being shaped topress the engaged portions into thread-engaging lugs integrallyconnected with the interior bead.

9. In an apparatus of the character described, means for retaining a capclosure having an annular flange, a movable die member having a groovefor inwardly bending the rim portion of the annular flange to produce onthe flange an annular inwardly rounded rim edge, said groove beingshaped to press the inwardly bent material following the rounded rimedge into a bead of the desired configuration, an anvil operative withinthe outline of the flange and radially with respect thereto for engaginga segment of the inwardly bent material and having a' shaping bill andsurface, said bill being engageable with the segment at a point beyondthe rounded rim edge, and said groove having cooperation with theshaping bill and surface to press the engaged segment into a lugprojecting radially inwardly on a slope toward the axis of the cap andterminating in a free edge.

10. In an apparatus of the character described,

a plunger having a relatively movable strike plate, both insertablewithin the annular flange of a cap closure, a die member relativelymovable on the plunger for inwardly bending the rim portion of theflange and shaped to form the inwardly bent portion into a bead ofdesired configuration, and means movable by the plate for engaging andforming into a projecting lug a segment of the portion being inwardlyformed, said means and ie member cooperating to press the projecting luginto desired form concurrently with the formation of the bead. i

11. In an apparatus of the character described, a plunger, a strikeplate connected with the plunger for movement toward the end of thesame, both the plate and plunger end being of a size to enter the spacedefined by the annular flange of a cap closure, 9. die member on theplunger and having a groove for receiving the annular flange, saidgroove being formed to upset the rim portion of the flange inwardly andto press the upset portion into a bead of desired configuration, pivotedradial anvils on the plunger arranged to be moved by the plate into aprotruding position for engaging segments of the upset portion, saidanvils cooperating with said groove for pressing'the engaged segmentsinto projecting lugs concurrently with the forming of the bead.

12. An apparatus of the character described comprising a plunger havinga cylindrical head, a strike plate in spaced alignment with the head andconnected with the head to move toward the free end of the same, a diemember movable in its axial direction longitudinally of the plunger toadvance beyond the free end of the head toward the strike plate andhaving an annular groove, and a pivoted member provided with a billbetween said plate and head to be engaged and moved by said plate so asto enter the bill in said groove when the die member is actuated.

13. An apparatus of the character described comprising in combinationwith a plunger having a cylindrical head, a cylindrical die member onthe head having an annular groove adjacent the surface thereof, anvilmembers pivoted in radial grooves in said head to move from a positionin front of the free end of the head to a position in which they projectbeyond the circumference of the head for entering said groove, and meanscomprising a strike plate carried by pins slidable in the head formoving said anvil members.

14. An apparatus of the character described comprising in combinationwith a plunger having a cylindrical head, a cylindrical die member onthe head having an annular groove adjacent the surface thereof, anvilmembers pivoted in radial grooves in said head to move from a positionin front of the free end of the head to a position in which they projectbeyond the circumference of the head to enter said groove, means carriedby the head for moving said anvil memmovement of the strike plate andmovement of the anvil members themselves to their front position.

15. In an apparatus for operating on a closure cap to form on the flangethereof an internal bead and a thread-engaging lug, a plunger having arelatively movable strike plate adapted to enter the cap and strike thecrown thereof, a pivoted member movable in a slot in the plunger, saidmember having an anvil portion and being movable by the strike plate toproject its anvil portion beyond the outline of the plunger to lie injuxtaposition to the inner face of the flange when the strike plateengages the crown, .and a movable die member on the plunger providedwith a groove for receiving the flange, said groove being shaped toupset the rim portion of theflange inwardly upon the anvil-portion andto press the same thereon to form a thread engaging lug whileconcurrently forming a bead at the opposite side of the lug.

16. The method of fabricating a thread-engaging type of cap closurehaving a cylindrical flange with a bottom rim edge of uniform extentfrom the crown of the closure, which consists in bending under diecontrol, without altering the outer face of the flange, a uniform amountof the bottom rim edge to produce a transversely rounded inwardlydirected rim edge portion and also a marginal interior portion, bothextending circumferentially around the flange and the marginal interiorportion terminating above the plane of the lowermost surface of thetransversely rounded rim edge portion, and in bending under die controlthe' marginal interior portion into beads and lugs alternating in thecircumferential direction of the flange, the beads being curledoutwardly toward the inner face of the flange in substantiallysymmetrical rounded relation with the transversely rounded rim .edgeportion and the lugs being bent in an inward direction and shaped intoefiective thread-engaging form.

17. In a method of forming the rim portion of a cap closure into acurled bead and locking lug, the steps which consist in forming the rimportion of the closure into a curl by a plunger die provided with atransverse concavity acting upon one face of the rim portion, andsubjecting one segment of the rim portion to a lug shaping operationbetween one segment of the concavity and an anvil provided with a facingof a size and shape to produce the desired lug, the forming of the beadand lug being concurrent, by forcing said anvil toward the plungerduring the active movement of the'latter and into said concavity from alateral position opposite to the direction of the curling, thus shapingbetween the concavity and anvil a locking lug extending opposite to thedirection in which the curl of the bead terminates.

18. In a method of forming curled beads and locking lugs on the flangeof a cap closure, the steps which consist in bending a uniform edgeportion of the flange inwardly around the circumference thereof and intotransversely curved form by a plunger die with a transversely concaverecess acting upon the edge portion and subjecting the portion beinginwardly curved to curling by the concave recess acting on one facethereof while at spaced points segments of the portions being inwardlycurled are subjected to lug shaping operation between spaced segments ofthe concave recess and anvils provided withfacings of a size and shapeto produce the desired lugs, the forming of the alternating curled beadsand lugs being concurrent, by forcing said anvils at the same timetoward the plunger during the active movement of the latter and intosaid concave recess from positions inwardly of the line of movement ofthe die member, thus shaping in alternating relation with the curledbeads and between the concave recess and the anvils locking lugsextending opposite to the direction in which the curls of the beadsterminate.

19. The method of forming an interior locking projection on a capclosure flange of cylindrical form, which consists in subjecting auniform portion of the entire circumferential lower edge of the flangeto inward bending and curling pressure so as to produce an inwardlycurled supporttained which has its base and ends integral with. thesupporting bead.

20. The method of forming interior locking projections on a capclosure'flange of cylindrical. form, which consists in convexly curlinginwardly a uniform portion ofthe entire circumferential lower edge ofthe flange to produce inwardly of the flange a convexly curledsupporting base having beyond it a continuous marginal section,continuing to curl the marginal section to complete a curled bead aroundthe entire inner periphery of the flange, and while continuing thecurling to complete the curled bead, subjecting segments of the marginalsection at spaced points to bending and shaping pressure until suchsegments assume between the adjacent sections of the curled bead, theform of locking projections which project inwardly beyond the adjacentsegments of the curled bead.

21. The method of forming interior beads and locking projections on acap closure flangeof cylindrical form, which consists in forming aconvexly rounded supporting rim edge inwardly around the entirecircumferential lower edge of the flange by subjecting a uniform portionof the lower circumferential edge of the flange to bending and curlingpressure until the desired convexly rounded conformation is obtained,then subjecting definite segments of substantially the innermost portionof the supporting rim edge to curling pressure until substantiallytubular bead portions are obtained at the inner surface of the flange,and subjecting other segments of substantially the innermost portion ofthe supporting rim edge to bending pressure until locking projections ofthe desired shape and projection are obtained.

22. Apparatus of the kind described, having, in

combination, a movable die member and a movable anvil member, the diemember being shaped for inwardly upsetting the entire cylindrical edgeportion of a cylindrical flange to form a curled bead with asubstantially constant cross sectional curve around the entire innerperiphery of the flange, the die member and anvil member havingarrangement and operation so that as the.

' curled bead is produced by the die member the anvil member willcooperate with the die member to press out and shape from a segment ofthe material being upset, a locking projection which is supported by thecurled bead, and said anvil member being effective to dispose thelocking projection in a position in which it projects inwardly beyondthe curving surface of the adjacent segments of the curled bead. I

23. The method of forming metal closures which comprises shaping a blankinto a completed lug cap in a single stroke of a die, by engaging theraw edge of the blank skirt and bending inwardly the skirt throughoutthe entire circumference thereof, and while the skirt is being bentinwardly exerting an opposing force upon the inbending metal at spacedpoints to shape the metal into container engaging lugs.

24=. The method of forming metal closures which comprises shaping ablank into a completed lug cap in a single stroke of a die,'by engagingthe raw edge of the blank skirt and curling inwardly the skirtthroughout the entire circumference thereof, and while the skirt isbeing curled inwardly exerting an opposing force upon the incurlingmetal at spaced points to shape the metal into container engaging lugs.

25. The method of forming metal closures which comprises shaping a blankinto a completed lug cap in a single stroke of a die, by engaging theraw edge of the blank skirt and curling inwardly the skirt throughoutthe entire circumference thereof, and while the skirt is being curledinwardly engaging spaced portions thereof by members which shape suchportions of incurling metal into container engaging lugs.

26. The method of forming metal closures which includes engaging the rawedge of the blank skirt with a die to curl the skirt inwardly, and afterthe skirt has been curled a sumcient extent to give the particular lugsdesired, engaging spaced portions thereof by members which shape themetal into container engaging lugs, the remaining portions continuingcurling to form a bead by the continued movement of said die.

27. In a method of forming a metal closure, the steps which compriseshaping a blank into a cap in a single stroke of a die; by engaging theraw edge of the blank skirt and bending inwardly the skirt throughoutthe entire circumference thereof to form a circumferential bent inportion, and forming container engaging lugs from the bent in portionduring said die stroke.

28. In a method of forming a metal closure, the steps which comprisesubjecting a blank to a stroke of a die, to bend inward the blank skirtthroughout the entire circumference thereof to form a circumferentialbent in portion, and forming container engaging lugs from the bent inportion during said die stroke.

29. In a method of forming a metal closure, the steps which comprisecurling inwardly the blank skirt throughout the entire circumferencethereof to form a circumferential bent in portion, and after the metalhas been curled inwardly to the desired extent, engaging spaced portionsthereof simultaneously by a plurality of members which shape theincurled metal into container engaging lugs, and thereaftersimultaneously withdrawing said members.

30. The method of making a closure cap from a blank having a top and asubstantially cylindrical flange terminating in a free edge, whichcomprises the steps of curling the free edge of the flange radiallyinwardly to form a bead, partially uncurling circumferentially spacedportions of the bead, and thereby projecting the relatively uncurledportions radially inwardly beyond the adjacent curled bead portions toform locking lugs for said closure cap.

31. The method of making a closure cap from a blank having a top and asubstantially cylindrical flange terminating in a free edge, whichcomprises the steps of curling the free edge of the flange radiallyinwardly to form a bead, partially uncurling circumferentially spacedportions of the bead, while maintaining other portions in their curledcondition", and thereby projecting the relatively uncurled portionsradially inwardly beyond the adjacent curled bead portions to formlocking lugs for said closure cap.

WILLIAM MARTIN VOGEL.

DISCLAIMER 2,064,770.William Maa tin Vogel, Glen Ridge, N. J. METHOD-ANDAPPARATUS FOR MANUFACTURING BOTTLE CAPS. Patent dated December 15, 1936.

Disclaimer filed January 6, 1942, by the inventor. Hereby enters thisdisclaimer to claims 1, 4, 5, 6, 16, 19, 20, 21, 22, 29, 30, and 31 ofsaid Letters Patent.

[Ojficial Gazette February 10, 1942.]

